Posts on development — Page 3

Chrome ships the Soft Navigations API unflagged in 151, giving single-page apps a standardized way to measure LCP, INP, and CLS per route change instead of only on the first load.

Shadow DOM used to mean a blank page until your bundle loaded. The shadowrootmode attribute changed that, and it has been in every major browser since early 2024.

The Origin Private File System gives you byte-level, synchronous file I/O in the browser. Here's how it works, when to reach for it, and why it's the reason SQLite runs well on the web now.

The CSS light-dark() function collapses your two dark-mode palettes into a single declaration. Here is how it works, the color-scheme gotcha that trips everyone up, and how to wire up a manual theme toggle.

URLPattern went Baseline in late 2025, giving the platform a native, framework-free way to match and parse URLs. Here is how it works and where it earns its place.

Masonry layout is coming to CSS as grid-lanes, and Safari shipped it first. Here's how the new display value works, why it beats the JavaScript libraries, and what it fixes for keyboard users.

The Invoker Commands API lets a button declare what it controls with command and commandfor, replacing modal and popover glue code with plain HTML.

The auto-growing textarea has been a JavaScript rite of passage for years. A single CSS declaration now does the whole job, and it works on inputs and selects too.

Fallow is a Rust-native tool that maps your whole TS/JS codebase to catch dead code, duplication, and architecture drift. Here's how it fits alongside ESLint, Prettier, and agent guidelines when you're reviewing PRs you didn't write.